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IE820836L - Solid state load protection system - Google Patents

Solid state load protection system

Info

Publication number
IE820836L
IE820836L IE820836A IE83682A IE820836L IE 820836 L IE820836 L IE 820836L IE 820836 A IE820836 A IE 820836A IE 83682 A IE83682 A IE 83682A IE 820836 L IE820836 L IE 820836L
Authority
IE
Ireland
Prior art keywords
current
ground fault
load
resistors
resistive load
Prior art date
Application number
IE820836A
Other versions
IE52773B1 (en
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of IE820836L publication Critical patent/IE820836L/en
Publication of IE52773B1 publication Critical patent/IE52773B1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
    • H02H3/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

A solid state load protection system whereby the current supplied to a load is monitored enabling ground fault sensing to be used. A current sensor is utilized so as to produce an output current which is proportional to the current in the electrical circuit. Attached to the current sensing function is a resistive load which converts the current produced by the current sensing function to a voltage which is also proportional to the current utilized by the motor. Attached between two resistors which comprise the resistive load is a ground fault resistor which has its remaining end connected to the neutral leg of the current transformers of the current sensing function. The ground fault sensor monitors the voltage across the resistors in the resistive load and the current in the neutral leg of the current sensors. A ground fault condition is indicated when a current in the neutral leg of the current sensor is detected and thereby causes voltages across each of the resistive load resistors to be unequal to each other. If this condition is in excess of a predetermined level, for a predetermined period of time a trip signal to the output function is initiated, in turn causing a light-emitting diode to conduct and indicating a ground fault condition. The output function upon receiving a trip signal causes a second light-emitting diode to conduct and also de-energizes a contactor through which a current source is connected to a load. [US4347540A]
IE836/82A 1981-04-27 1982-04-07 Solid-state load protection system having ground fault sensing IE52773B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/258,106 US4347540A (en) 1981-04-27 1981-04-27 Solid-state load protection system having ground fault sensing

Publications (2)

Publication Number Publication Date
IE820836L true IE820836L (en) 1982-10-27
IE52773B1 IE52773B1 (en) 1988-02-17

Family

ID=22979119

Family Applications (1)

Application Number Title Priority Date Filing Date
IE836/82A IE52773B1 (en) 1981-04-27 1982-04-07 Solid-state load protection system having ground fault sensing

Country Status (15)

Country Link
US (1) US4347540A (en)
JP (1) JPS57183223A (en)
AU (1) AU546752B2 (en)
BE (1) BE892994A (en)
BR (1) BR8202361A (en)
CA (1) CA1182893A (en)
CH (1) CH664240A5 (en)
DE (1) DE3215147A1 (en)
ES (1) ES511689A0 (en)
FR (1) FR2504746A1 (en)
GB (1) GB2097611B (en)
IE (1) IE52773B1 (en)
MX (1) MX150743A (en)
PH (1) PH19693A (en)
ZA (1) ZA822619B (en)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113715A (en) * 1982-12-17 1984-06-30 株式会社東芝 Opposite phase protecting circuit for circuit breaker
FR2553943B1 (en) * 1983-10-24 1986-04-11 Merlin Gerin RESIDUAL DIFFERENTIAL DEVICE PROVIDED WITH A DEVICE FOR MONITORING THE ELECTRONIC POWER SOURCE
NZ216902A (en) * 1985-10-28 1988-11-29 Gen Electric Ground fault protection-power restored if fault is cleared
EP0235479B1 (en) * 1986-01-10 1993-08-04 Merlin Gerin Static tripping unit with test circuit for electrical circuit interruptor
US4809123A (en) * 1986-04-14 1989-02-28 Isco, Inc. Ground fault detector for high-voltage DC power supplies
AT390531B (en) * 1986-09-23 1990-05-25 Elin Union Ag Device for protection of a stator laminated core which is provided with core tightening bolts
FR2612347B1 (en) * 1987-03-09 1989-05-26 Merlin Gerin STATIC TRIGGER COMPRISING A HOMOPOLAR CURRENT DETECTION CIRCUIT
JPH0620340B2 (en) * 1987-05-22 1994-03-16 寺崎電気産業株式会社 Overcurrent trip device for circuit breaker
AU652019B2 (en) * 1991-01-16 1994-08-11 Felten & Guilleaume Fabrik Elektrischer Apparate Aktiengesellschaft Fault current circuit breaker
US5521787A (en) * 1993-07-28 1996-05-28 Sundstrand Corporation Differential current fault protection for a system utilizing a power conversion unit exhibiting balanced load characteristics
JPH07159496A (en) * 1993-10-12 1995-06-23 At & T Global Inf Solutions Internatl Inc Device and method for inspecting integrated circuit
US5973896A (en) * 1995-05-26 1999-10-26 David C. Nemir Shock and arc protection device for an electrical distribution system
US5844759A (en) * 1995-05-26 1998-12-01 David C. Nemir Electrical fault interrupter
US5940257A (en) * 1995-09-29 1999-08-17 Siemens Energy & Automation, Inc. Method and apparatus for alternating current monitoring with phase and magnitude measurement
US6407894B1 (en) * 1999-11-05 2002-06-18 Siemens Energy & Automation, Inc. Method and apparatus for differentially sensing ground fault and individual phases
DE10002537A1 (en) * 2000-01-21 2001-07-26 Volkswagen Ag Method for detecting a faulty ground connection in an electrical device, in particular a motor vehicle
US7362551B2 (en) 2001-02-01 2008-04-22 Hydro-Aire, Inc. Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof
US6583975B2 (en) * 2001-02-01 2003-06-24 Hydro-Aire, Inc. Aircraft applicable ground fault circuit interrupter
US7016171B2 (en) 2001-02-01 2006-03-21 Hydro-Aire, Inc. Current fault detector and circuit interrupter and packaging thereof
US6894478B1 (en) * 2001-10-26 2005-05-17 E.O. Schweitzer Manufacturing Company, Inc. Fault indicator with automatically configured trip settings
US20030165037A1 (en) * 2002-03-01 2003-09-04 Stephen Liscinksy Three-phase supervisory circuit
BR0308423A (en) * 2002-03-14 2005-03-01 Ambient Corp Voltage inductive coupler device protection means
US6700770B2 (en) * 2002-03-22 2004-03-02 Turnstone Systems, Inc. Protection of double end exposed systems
US6879224B2 (en) * 2002-09-12 2005-04-12 Agilent Technologies, Inc. Integrated filter and impedance matching network
US20040075963A1 (en) * 2002-10-18 2004-04-22 Solidone Usa Corp. Solenoid energy control method and a multi-stage over-current protector
US7129652B2 (en) * 2004-03-26 2006-10-31 Texas Instruments Incorporated System and method for driving a plurality of loads
KR101068718B1 (en) * 2009-05-21 2011-09-28 엘에스산전 주식회사 Abnormal current detection circuit for circuit breaker
US8941956B2 (en) 2011-07-26 2015-01-27 Railpower, Llc Switching ground tether circuit
US9413178B2 (en) 2011-11-11 2016-08-09 General Electric Company Charging device and method of detecting a connection to ground
WO2013155356A1 (en) * 2012-04-12 2013-10-17 Littelfuse, Inc. Neutral grounding resistor monitor
US9081039B2 (en) * 2012-05-17 2015-07-14 GM Global Technology Operations LLC Vehicle electrical system fault detection
CN105492911B (en) * 2013-06-07 2019-02-26 iEP2研究有限公司 Electrical protection device and method of providing electrical protection
GB201312974D0 (en) * 2013-07-19 2013-09-04 Siemens Ag Turbine engine control system
US20160061872A1 (en) * 2014-08-29 2016-03-03 James J. Kinsella Non-destructive short circuit testing for electrically operated circuit breakers
JP6759694B2 (en) * 2016-05-11 2020-09-23 凸版印刷株式会社 Goebel top type packaging container
CN115114964B (en) * 2022-07-21 2023-04-07 西南交通大学 Sensor intermittent fault diagnosis method based on data driving

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329870A (en) * 1965-02-19 1967-07-04 Square D Co Static tripping device for an electric circuit breaker
US3602783A (en) * 1970-05-07 1971-08-31 Westinghouse Electric Corp Circuit breaker device including improved overcurrent protective device
US3818275A (en) * 1973-01-30 1974-06-18 Westinghouse Electric Corp Circuit interrupter including improved trip circuit using current transformers
US3996499A (en) * 1974-09-09 1976-12-07 Westinghouse Electric Corporation Zener diode effect on long acceleration module
US4021703A (en) * 1975-06-02 1977-05-03 Westinghouse Electric Corporation Phase imbalance detection circuit
FR2327662A2 (en) * 1975-10-06 1977-05-06 Electricite De France Self regulating overcurrent protection for multiphase power lines - has two transistors connected as Darlington pair to provide delayed action inversely proportional to excess current
US4115829A (en) * 1977-05-06 1978-09-19 General Electric Company Overcurrent and ground fault responsive trip unit for circuit breakers
US4271444A (en) * 1979-07-31 1981-06-02 General Electric Company Ground fault trip mode network for static trip circuit breakers

Also Published As

Publication number Publication date
DE3215147A1 (en) 1982-11-25
AU8266282A (en) 1982-11-04
BR8202361A (en) 1983-04-05
US4347540A (en) 1982-08-31
FR2504746B1 (en) 1985-05-17
DE3215147C2 (en) 1992-10-22
CA1182893A (en) 1985-02-19
FR2504746A1 (en) 1982-10-29
IE52773B1 (en) 1988-02-17
AU546752B2 (en) 1985-09-19
BE892994A (en) 1982-10-27
CH664240A5 (en) 1988-02-15
JPH0320967B2 (en) 1991-03-20
MX150743A (en) 1984-07-09
GB2097611B (en) 1984-09-05
ES8306292A1 (en) 1983-05-01
GB2097611A (en) 1982-11-03
ES511689A0 (en) 1983-05-01
JPS57183223A (en) 1982-11-11
PH19693A (en) 1986-06-13
ZA822619B (en) 1983-04-27

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Legal Events

Date Code Title Description
MM4A Patent lapsed